Edwabd healy



' @attra tstra @anni @ff-ire.

EDWARD MEA-LY, OE OEIGAGQVILLINOISL Least Para# No. 68,074, daad August 27, 1867.

AIMrEOvEMENr1N MEOEANIQAL MOVEMENT EOE WORKING saws, at.

y @its tlgnult maar tu' iu time trtters rtmt mit Outing artt nf tige stun.

'lO ALL WHOM IT MAY CONCERN:

Be Vit known that I, EDWARD HEALY, of Chicago, in the county'oi` Cook, and State Illinois, halve invented a new and useful Improvement in Sewing Machines; andI do hereby declare the following to lhe a full and exact description of the same, reference being had to the accompanying drawing, which is made a part of this speciication, and which represents aperspective view of 'a sawing'machine embodying my invention.

The machine, the subject of this invention, is more especially intended to perform such work as requires great velocity in the-motion of the saw', and in which the intervals of the saws action enable it to regain the requisite speed for eiicctive operation. I i i The invention consists in the employmentof a system of jointed levers for transmitting motion to the saw-shaft, said levers being extended by the motion of a. rock-shaft and contracted bysprings, as hereinafter described, their action being such as to secure a very rapid and steady motion, especiallyr eilective ,for the kind of work which is4 to be performed by the saw. I i

In order that others skilled in the art to which my invention 'appertains may be enahled'to fully understand and use the same, I will proceed to describe it in detail. l

In theaceompanyingdrawing, A may represent a frame, constructed in any suitable manner, and supporting at one end the shaft which carries the circular saw B, Motion is communicated to the'saw-s'haft from the crankshaftA Cfthrough vthe multiplying-.wheels D I)1 D2 D"I and belts E E. The crank C is driven by the pitman' F, which is attached to the cross-head Gr mounted on suitable guides, and4 which vis also jointed to two of a system of levers, III-IH, which are jointed together in the manner represented, saidlevers servingto reciprocate the pitmanbyalteruate extension end contraction. The levers H,at the end opposite their point of connection with the pitman F, are jointed to lugs on the main frame A. I is a rock-shaft, which is straddled by the adjacent levers I-I, as represented, and which is of suliieiently diminished size to permit said levers freely to expand and contract. The eii'ective oscillation of the rock-shaft I is made to extend or `elongate the levers H by winding upon its periphery the chains or other iiexibleco'nneetions J, the ends of which are :jointed respectively to lugs on the shaft I, and to two of the pins which connect together the ends of the levers H. Thus, when the shaft I is turn-ed in one direction by hand, steam, or other power, the connected extremities of one set of the leversl are drawn together with considerablepower, and the whole system of Alevers is thereby extendedor elongated toward the ,crank C.' The levers H, after being'thus extended, are drawn back or contracted bythe action 0i' springs K, the upper and lower'ones of which engage with pins Zheldby links L L, which are jointed to the levers H. The levers H occupy very little available space in the machinery, and they constitute a simplel means for imparting a very high degree of velocity to the saw. Instead Aof applying the power directlyto the levers, as above described, it may be transmitted thereto through an additional system of levers for the` purpose of augmenting the speed to a. still greater extent. A carriage, at P, may be employed for feeding the log to the saw.

Having thus described my invention, what I claim as new herein, and desire to secure by Letters Patent, is 1.' The combination of a system of levers H with a exible connection, J, suhstantiallyas and for the purposes set forth.

` 2. The arrangement of the levers H, rock-shaftl, flexible connections J, and springs K, substantially as 1nd for the purpose set forth.

To the above specification of my improvement in sawing machines I have signed my hand this third day of April, 1867.

"EDWARD HEALY. Witnesses:

CMAS. D. SMITH, CIIAS. A. Pn'r'rrr. 

